Very fine decorated oval shaped watch with brooch Circa 1850

Unusual gold, enamel, pearl and diamond set pendant watch
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A very fine, rare and unusual Swiss 18 carat gold, enamel, pearl and diamond set oval shaped pendant watch with visible balance and brooch, circa 1850. Oval shaped gilt finished full plate cylinder movement. White enamel oval shaped dial, small eccentric hour dial with Breguet numerals, aperture for the diamond set three armed balance spinning against a polished steel plate. Oval shaped case with pearl set rims, hinged back decorated with translucent blue-grey enamel over an engine turned background, centred by painted multi-coloured enamel coat-of-arms under a ducal crown. Comes with later added gold and blue champlevé enamel brooch with hinged pin. Case stamped with casemakers initials JF in a lozenge.
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Width: 22 mm
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Length: 34 mm
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Overall length including brooch aproximately: 80 mm
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Signed: No name